试述医院感染的病原特点。
患者,男,50岁。咳嗽,咯吐痰涎清稀而色白。若用半夏治疗,不宜再配用的药物是() ["陈皮","川乌","茯苓","甘草","天南星"]
加热至56℃时最不稳定的ALP同工酶是() ["肝ALP","骨ALP","肠ALP","胎盘ALP","肾ALP"]
与心脏是否受损关系不大的血清酶是() ["AST","α-HBD","CK","LD","ALP"]
为防止红细胞对ACP测定的干扰,常加入下列何种抑制剂以提高检测的特异性() ["苯丙氨酸","L-酒石酸","尿酸","EDTA","L-半胱氨酸"]
根据病原体来源不同。试述医院感染的类型。